A full-circle scene combining 817 images taken by the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity. The US space agency NASA is calling it the "next best thing to being" on the Red Planet. (AFP Photo/)

A full-circle scene combining 817 images taken by the panoramic camera (Pancam) on NASA's Mars Exploration Rover Opportunity. The US space agency NASA is calling it the "next best thing to being" on the Red Planet. (AFP Photo/)